How to factorize 13916767508299776?

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CHANDRABHAN Singh
CHANDRABHAN Singh el 13 de Jun. de 2020
Comentada: madhan ravi el 13 de Jun. de 2020
Hi, I want to factorize 13916767508299776 into its prime factors. How can ew do that?
Thanks in advance.

Respuesta aceptada

Walter Roberson
Walter Roberson el 13 de Jun. de 2020
factor(uint64(13916767508299776))

Más respuestas (1)

madhan ravi
madhan ravi el 13 de Jun. de 2020
factor(sym(13916767508299776))
  2 comentarios
Walter Roberson
Walter Roberson el 13 de Jun. de 2020
You should use
factor(sym('13916767508299776'))
because the argument to sym() is processed as a double before it is passed to sym, so when the value is greater than flintmax (2^53) then sym() will not necessarily receive the correct number to factor.
uint64() with a simple number as parameter is parsed as 64 bit by MATLAB; the number is not read in as double and then passed to uint64(). Not in new enough versions -- in sufficiently old releases, that did happen so it was necessary in some old enough releases to use other ways of constructing accurate uint64, such as
sscanf('13916767508299776', '%lu')
madhan ravi
madhan ravi el 13 de Jun. de 2020
Thank you sir Walter, very useful.

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